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Property, Plant And Equipment, Net (Schedule Of Property, Plant And Equipment, Net) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Property, Plant and Equipment, Net [Line Items]      
Land, buildings and leasehold improvements $ 361,246 [1],[2] $ 351,748 [1],[2]  
Instruments, machinery and equipment 629,290 [1],[3] 583,535 [1],[3]  
Office furniture and other 76,939 [1] 72,995 [1]  
Motor vehicles and airplanes 131,106 [1] 104,551 [1]  
Property, plant and equipment, gross 1,198,581 [1] 1,112,829 [1]  
Accumulated depreciation (680,973) (608,978)  
Depreciated cost 517,608 503,851  
Depreciation expenses 93,666 84,412 82,497
Grants received 29,367 29,084  
Equipment produced for self use $ 173,649 $ 167,248  
Israel [Member]
      
Property, Plant and Equipment, Net [Line Items]      
Real estate owned, square feet 2,193,000 [4]    
Real estate leased, square feet 2,024,000 [4]    
United States Of America [Member]
      
Property, Plant and Equipment, Net [Line Items]      
Real estate owned, square feet 713,000 [5]    
Real estate leased, square feet 618,000 [5]    
Other Countries [Member]
      
Property, Plant and Equipment, Net [Line Items]      
Real estate owned, square feet 1,063,000 [6]    
Real estate leased, square feet 300,000 [6]    
[1] Net of investment grants received (mainly for instruments, machinery and equipment) in the amounts of $29,367 and $29,084 as of December 31, 2011 and 2010, respectively.
[2] Set forth below is additional information regarding the real estate owned or leased by the Company (in square feet):
[3] Includes equipment produced by the Company for its own use in the aggregate amount of $173,649 and $167,248 as of December 31, 2011 and 2010, respectively.
[4] Includes offices, development and engineering facilities, manufacturing facilities, maintenance facilities, hangar facilities and a landing strip in various locations in Israel used by Elbit Systems' Israeli subsidiaries.
[5] Includes offices, development and engineering facilities, manufacturing facilities and maintenance facilities of Elbit Systems of America primarily in Texas, New Hampshire, Florida, Alabama and Virginia.
[6] Includes offices, design and engineering facilities and manufacturing facilities, mainly in Europe, Brazil, Australia and Asia.